- Researchers believe they've discovered the oldest known evidence of life on Earth. Scientists found signs of biological activity in 3.95 billion-year-old rocks from Labrador in northeast Canada. The rock samples were formed when Earth was 500 million years old. https://www.theguardian.com/science/2017/sep/27/carbon-found-in-395bn-year-old-rocks-is-remnants-of-ancient-life-say-researchers 13 comments science
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